Floor-sander.



J. M. KELLY.

FLOOR SANDER.

APPLICATION FILED FEB. 23. 19u.

2 SHEETS-SHEET l.

Patented 0010.23, 1917.

Inventor Attorneys J. M. KELLY.

FLOOR SANDER. APPLlcATIoN mtu rzs.2a, 19H.

Patented Oct. 23,1917.

2 SHEETS-SHEET 2.

Inventor Witnesses Attorneys To all whom it may concern.'

Be it known that I, JAMiis M. KELLY, a citizen of the United States, residing at Portland, in the county of Multnomah and S ate of Ore on, have invented a new and useful Floor-gander, of which the following is a specification.

The device forming the subject matter of this application is a fioor sander, and one object of the' invention is to providenovel means whereby the supporting platform may be moved forwardly and rearwardly with respect to the axle which carries the wheels, to the end that more orv lessv weight ma be thrown on the rotating attrition drum w ich is journaled at the forward end of the machine.

Another object of the invention is to provide novel means whereby the' wheels may be shifted, to enable the attrition drum to be disposed at an acute angle to the line of advance of the machine, thereby enabling the drum to operate on the floor which is being sanded, at an acute angle to the grain of the wood in the floor. 'l

Another object of the invention is to provide novel means whereby the dust produced by th; sanding operation will be taken care o lt is within the province of the disclosure to improve generally and lto enhance the utility of devices of that type to which the present invention appertains.

With the above and `other objects in view which will appear as the description pro'- ceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter'described and claimed it being understood that changes in the precise embodiment of the invent-ion herein disclosed can be made within the scope of -what is claimed, Without departing from the spirit of the invention. I

In the accompanying drawings z- Figure 1 is a longitudinal section of a floor sander constructed in accordance with the present invention, parts being shown in elevation;

Fig. 2 isasection taken approximately on the line 2--2` of Fig. 1;

Fig. 3 is a top plan of a sanding machine constructed in accordance with the present invention, parts being broken away;

Fig. 4g is a fragmental transverse section Speoication of Letters Patent.

Application led February 23, 1917. Serial No. 150,829.

sundr Patented oct. as, aait.

of the platform of the machine and illustratmg a portion of the mechanism whereby and t e ax e are broughtl about;

Fig. 5 is a composite'` perspective View is a carriage 4, which is adapted to move fore and aft of the machine. The carriage 4 is provided with rollers 5 which bear on the track 2'.- Fixed to and depending from the carriage 4 is a bracket 6 merging into a stem 7 having a head 8 which extends fore and aft of the machine. designates a pair of clamps having openings 10 in which the ends of the head 8 are mounted for rocking movement, the clamps being cut away on their inner faces as shown at 11, to permit the stem to swing when the head 8 rocks in the openings 10. rlhe clamps 9 have coperating recesses 12 receiving an axle 16. The clamps 9 are supplied with openings 15. receiving securin elements 14 whereby the clamps may be he d. on the axle 16. A rod 17 is attached to the carriage 4 and passes through a'lug 18depending from the platform 1. Nuts 19 are threaded onto the rod 17 and coperate with the lug 318 to secure a longitudinal movement of the rod 17 and tohold the rod in adjusted positions.

The axle 16 is provided with ends f 20 mounted to swing in horizontal planes, the ends of the axle carryingwheels 21. 4'lhe ends 20 of the axle 16 are supplied with rearwardly extendedI arms 22 to which the ends of a rod 23 are pivoted. A rod 24 has a common pivotal connection with one end of the rod 23 and one of the arms 22. The rod -24 extends transversely of the machine,

and rearwardly, the rod 24 being pivoted to 4 l.

an upwardly extendedlever 25, the forward ad'ustments between the platform.-

contour of the track 2 above the iianges 3 The numeral 9 end of the lever 25 being pivoted at 26 to the aXle 16. l

With the forward end of. the platform 1 1s assembled a frame embodying a pair of side plates 31, attached as shown at 32 to the forward end of the platform, the side plates 31 being united by cross rods 33. rlhe side plates 31 are 'connected by a forward hood 34, merging into a rear hood 35 which likewise connects the side plates. The rear end of the hood 35 is secured as shown at 36 to the forward end of the platform 1. Mounted in the side plates 31 are bearings 37 held in place by securing plates 38. Journaled 1n the bearings 37-is a shaft 39 carrying a drum 40, the end walls of the drum being connected by means of weights 41, so that the drum, which is the attrition member, may bear wlth the` necessary pressure on the floor which is to be sanded. The shell of the drum 1s surrounded by a cover 42 which may be of felt, the felt covering 42 acting as a cushion for a sandpaper strip 44 surrounding the drum. The drum 4() has a slot 43 through which the ends of the sandpaper strip 44 are inserted. Extended longitudinally of the drum and journaled therein are eccentrically mounted clamp shafts` 45 which serve to hold the ends of the sandpaper strip 44 after the said ends havebeen inserted through the slot 43. rllhe clamp shafts 45 have exposed squared ends 46 to which a wrench or key may be applied, in order to manipulate the shafts. As shown in Fig. 6, one side plate 31 of the drum is provided with an opening 47, through which the squared ends 46 of the clamp shafts 45 are accessible. The end walls of the drum are united by a, counterweight 48 which serves to offset the-weight of the clamp shafts 45.

Mounted on the ends of the shaft 39 and disposed exteriorly of the side plates 31 are sprocket wheels 49 around which are trained sprocket chains 50 engaged with sprocket wheels 51 on the ends of a counter shaft 52 journaled in the side plates 1 adjacent the upper ends thereof. Secured to the countershaft 52 is a sprocket wheel 53 around which is trained a sprocket chain 54 engaged with a sprocket wheel 55 on a fan shaft 56, the latter being journaled in the side plates 31 to the rear of the drum shaft 39. The fan shaft 56 is provided with blades 57. Journaled on the countershaft 52 is a sprocket wheel 58 engaged with a sprocket chain 59 passed around a sprocket wheel 60 carried by the shaft of a motor 61 of any desired construction, the motor 61 being moiuited on the platform 1. The numeral 62 denotes a clutch whereby the sprocket wheel 58 may be connected With and disconnected from the countershaft 52. The clutch 62 is manipulated by means of a lever 63 fulcrumed at 64 on one of the cross rods 33. rlhe lever which may be a bolt provided '79. Owing to the fact is sustained by braces 73 extended downwardly to the rear end of the platform 1. The frame 72 carries a handle 74. A

bracket 27 is attached to the handle 74 and has an arcuate slot 28. In the rear end of the lever 25 there is a slot 29 which extends longitudinally of the lever. A clamp 30 'with a hand nut is mounted to operate in the slot .28 of the bracket 27 and in the slot 29 of the lever 25.

The numeral 75 denotes a dust-pan supported below the forward end of the platform 1. An apron 76-is pivoted at its forward end, as shown at 77, to the bottom of the dust-pan 75. The dust-pan 75 has a reduced end 78 located adjacent one side of the platform l as shown in F ig. 3. The end 78 of the dust-pan communicates with a pipe 79 which extends upwardly, and then horizontally as shown in Fig. 3thc pipe 79 having a depending end 80 connected with a foraminous sack 81 supported on the platform 1 at the rear end thereof and sustained additionally by means of a frame 82 carf ried by the platform 1.

In practical operation, when the motor 61 is working, motion is transmitted by the sprocket wheel 60 and the sprocket chain 59 to the sprocket wheel 58 and thence to the countershaft 52. The countershaft 52 drives the fan shaft56 by means of the sprocket wheel 53, the sprocket chain 54 .and the sprocket wheel From the countershaft 52, motion is transmitted to the drum shaft 39 by way of the sprocket wheels 51 on the shaft 52, the sprocket chains 59 and the sprocket wheels 49 on the drum shaft 39. When the drum shaft 39 is rotated, the sandpaper strip 44 thereon will smooth off the floor. The dust detached by the action of the sandpaper strip 44 is passed rearwardly into the apron 76 by the .fan blades 57, and by the fan blades 57 the dust is driven rearwardly into the dust-pan 75, the dust traversing the reduced rear end 78 of the dust pan, and entering` the foraminous sack 81 by way of the pipe that the apron 76 is pivotally connected with the dust-pan 75 as shown` at 77, the apron will be found to be peculiarly eiiioient in collecting practically all of the dust that is produced when the attrition drum 40 is rotated.

The operator may at any time disconnect the sprocket Wheels 58 from the countershaft 52, and thus stop the rotation of the due tothe suction created l'the clutch 62 by means of the lever 63, the

lever 66 and the rod 70, it being possible to manipulate this rod, and the lever 25, from the rear of the machine, while the operator is trundling the machine along by the handle 74.

Certain salient features of'the invention' remain yet to be discussed. When the rod 17 is shifted endwise, by turning the nuts 19, the carriage 4 is moved fore and aft of the machine. Since the carriage 4 is connected with the axle 16 and the wheels 21 by means of the stem 7, the head 8 and the clamps 9, it will be obvious that the weight of the plat/form 1 and parts carried thereby may be shifted longitudinally of the machine with respect to the axle 16. Inl this way, a

20 f greater or less weight may be imposed on the attrition drum 40, and the latter will bear with a correspondingly adjusted pressure on the floor, during the sanding operation.

rlhe lever 25 may be swun'gtransversely on its fulcrum 26, when the clamp 30 is loosened, the' clamp moving in the slot 28 of the bracket 27. When the lever 25 is swung, the rod 24 will be actuated, and the rod 24, through the. instrumentality of the rod 23 and the arms 22 of the axle ends 20 will shift the wheels 21, so that the wheels do not stand parallel to the longitudinal edges of the platform 1, as shown in Fig. 3. Under such circumstances, the axis of thev attrition drum 40 will not stand at right angles to the line of advance of the machine, but will define an angle less than a rightan- .gle with respect to the line of advance. As V a consequence, the sandpaper strip 44 on the attrition drum l40 will operate transversely of thegrain of the boards making up the floor which is being sanded or ground off. It has been pointed out hereinbefore that the axle 26 may be shifted longitudinally of the machine, so'as to affect the balance of the machine. It is because of this movement that the rear end of the'lever 25 is provided with the slot 29 which receives the clamp 30.

Should the wheels 21 of the machine pass over uneven surfaces inthe Hoor, the xle 16 can tilt transversely of the machine, `without materially affecting the bearing contact between the attrition drum 40'and the floor.

This tilting movement of the axle is possible .because the head 8 of Fig. 5 which extends fore and aft of the machine is mounted to rock inthe journaling openings 10 of the clamps 9 which are secured to the axle 16.

Having thus described the invention, what is claimed is t '1. In a device for sanding floors, a truck;

Aa movable attrition member carried by the forward end of the truck and having its axis disposed in a substantially vhorizontal plane transversely of the truck; means for driving the attrition member; a single pair of supporting wheels carriedl by the truck and located at the sides' thereof;l and means for moving 4the wheels about independent 4vertical axes, to vary the `position of the wheels with respect to the :line of advance of the truck, and to cause the attrition member to operate on the Hoor at an acute angle to the line of advance of the. truck.

v2. In a device for sanding floors, a truck;

a carriage mounted to move forwardly and rearwardly on the truck; 'means for moving y the carriage forwardly and rearwardly on the truck; an axlev mounted on the carriage to tilt transversely of the truck; and an attrition member 'carried by the forward end of the truck.

3. In a device for sanding floors, a truck; a carriage mounted -to move longitudinally of the'truck; means for moving the carriage -longitudinally of the truck; an axle mounted on the carriage to tilt transversely of the truck; horizontally movable ends carried by the axle; supporting wheels journaled on the ends of thev axle; means for shifting the-ends of the axle to vary the angle between the supporting wheels and the line of advance of the truck; and an attrition member carried by the forward end of the truck.

4. In a device for sanding floors, a truck;

an axle carried by the truck;l supporting wheels carried by-,the axle; a fan ]ournaled at the forward end Aof the truck; an attrition drum journaled at the forward end of.

the truck in front. of the fan; a countershaft; means for connecting the counterf shaft with the drum and with the fan; a motor on the truck; a wheel journaled on the countershaft; mechanism for vconnecting the `wheel operatively with the motor; a clutch whereby the wheel may be connected with the countershaft to rotate the countershaft;

and mechanism for operating the clutch from a point adjacent the rear end of the truck. i

In testimony that I claim the'foregoing as my own, I havehereto affixed my signal 'ture in the presence of two witnesses.

' JAMES M. KELLY..

. `Witnesses: y

' GENEVIEVE QUIGLEY,

M. J. Hrm.. 

